add keyboard accessibility service

app/src/main/java/com/limelight/Game.java

@@ -92,6 +92,8 @@ public class Game extends Activity implements SurfaceHolder.Callback,
         OnGenericMotionListener, OnTouchListener, NvConnectionListener, EvdevListener,
         OnSystemUiVisibilityChangeListener, GameGestures, StreamView.InputCallbacks,
         PerfOverlayListener, UsbDriverService.UsbDriverStateListener, View.OnKeyListener {
+
+    public static Game instance = null;
     private int lastButtonState = 0;
 
     // Only 2 touches are supported
@@ -121,6 +123,9 @@ public class Game extends Activity implements SurfaceHolder.Callback,
     private boolean displayedFailureDialog = false;
     private boolean connecting = false;
     private boolean connected = false;
+    public boolean isConnected() {
+        return connected;
+    }
     private boolean autoEnterPip = false;
     private boolean surfaceCreated = false;
     private boolean attemptedConnection = false;
@@ -185,6 +190,8 @@ public void onServiceDisconnected(ComponentName componentName) {
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
 
+        instance = this;
+
         UiHelper.setLocale(this);
 
         // We don't want a title bar
@@ -1072,6 +1079,8 @@ protected void onPause() {
     protected void onStop() {
         super.onStop();
 
+        instance = null;
+
         SpinnerDialog.closeDialogs(this);
         Dialog.closeDialogs();
 

app/src/main/java/com/limelight/KeyboardAccessibilityService.java

@@ -0,0 +1,47 @@
+package com.limelight;
+
+import android.accessibilityservice.AccessibilityService;
+import android.view.KeyEvent;
+import android.view.accessibility.AccessibilityEvent;
+
+import java.util.Arrays;
+import java.util.List;
+
+public class KeyboardAccessibilityService extends AccessibilityService {
+
+    private final static List<Integer> BLACKLISTED_KEYS = Arrays.asList(KeyEvent.KEYCODE_VOLUME_UP, KeyEvent.KEYCODE_VOLUME_DOWN, KeyEvent.KEYCODE_POWER);
+
+    @Override
+    public boolean onKeyEvent(KeyEvent event) {
+        int action = event.getAction();
+        int keyCode = event.getKeyCode();
+
+        if (Game.instance != null && Game.instance.isConnected() && !BLACKLISTED_KEYS.contains(keyCode)) {
+            // Preventing default will disable shortcut actions like alt+tab and etc.
+            if (action == KeyEvent.ACTION_DOWN) {
+                Game.instance.handleKeyDown(event);
+                return true;
+            } else if (action == KeyEvent.ACTION_UP) {
+                Game.instance.handleKeyUp(event);
+                return true;
+            }
+        }
+
+        return super.onKeyEvent(event);
+    }
+
+    @Override
+    public void onServiceConnected() {
+        LimeLog.info("Keyboard service is connected");
+    }
+
+    @Override
+    public void onAccessibilityEvent(AccessibilityEvent accessibilityEvent) {
+
+    }
+
+    @Override
+    public void onInterrupt() {
+
+    }
+}

app/src/main/res/values/strings.xml

@@ -298,4 +298,7 @@
     <string name="analogscroll_none">None (both sticks move the mouse)</string>
     <string name="analogscroll_right">Right analog stick</string>
     <string name="analogscroll_left">Left analog stick</string>
+
+    <string name="keyboard_service_label">Moonlight Physical Keyboard Service</string>
+    <string name="accessibility_description_text">These permissions are only used to detect when buttons are pressed so they can be sent to PC without triggering default action on your device.\n\nMoonlight does NOT observe the text you type and does NOT collect your passwords, credit card numbers or any other information.</string>
 </resources>

app/src/main/res/xml/keyboard_accessibility_service.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<accessibility-service xmlns:android="http://schemas.android.com/apk/res/android"
+    android:accessibilityEventTypes="typeContextClicked|typeViewClicked|typeViewFocused|typeViewScrolled|typeViewSelected|typeWindowContentChanged|typeWindowStateChanged"
+    android:accessibilityFeedbackType="feedbackSpoken"
+    android:accessibilityFlags="flagDefault|flagRequestFilterKeyEvents|flagRetrieveInteractiveWindows"
+    android:canRequestFilterKeyEvents="true"
+    android:description="@string/accessibility_description_text"
+    android:notificationTimeout="100"
+    android:settingsActivity=""
+    android:summary="@string/keyboard_service_label" />

app/src/nonRoot/AndroidManifest.xml

@@ -3,5 +3,19 @@
 
     <!-- Non-root application name -->
     <!-- FIXME: We should set extractNativeLibs=false but this breaks installation on the Fire TV 3 -->
-    <application android:label="@string/app_label" />
+    <application android:label="@string/app_label">
+        <service
+            android:permission="android.permission.BIND_ACCESSIBILITY_SERVICE"
+            android:name="com.limelight.KeyboardAccessibilityService"
+            android:label="@string/keyboard_service_label"
+            android:enabled="true"
+            android:exported="false">
+            <intent-filter>
+                <action android:name="android.accessibilityservice.AccessibilityService" />
+            </intent-filter>
+            <meta-data
+                android:name="android.accessibilityservice"
+                android:resource="@xml/keyboard_accessibility_service" />
+        </service>
+    </application>
 </manifest>